The Doctor arrives in Victorian London. It's Christmas, but snow isn't the only thing descending on the tranquil and jubilant civilization, as familiar silver giants from an alternate reality are amassing in numbers. The Cybermen are on the move again, and the only beings who can stop them are the Doctor and... another Doctor?
| Writing | Russell T Davies | Writer |
| Production | Susie Liggat | Producer |
| Directing | Andy Goddard | Director |
| Production | Russell T Davies | Executive Producer |
| Production | Catrin Lewis Defis | Associate Producer |
| Production | Julie Gardner | Executive Producer |
| Camera | Ernest Vincze | Director of Photography |
| Editing | Richard Cox | Editor |
| Sound | Murray Gold | Original Music Composer |
